Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 388 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
2. 2.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
3. 3.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a balloon
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a magnet
6. 6.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the weight of the bob (d) the string length
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a ruler (d) a heavy nut or washer
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
18. 18.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
19. 19.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a heavy nut or washer (d) a ruler
21. 21.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
22. 22.True or false: a ruler is not needed for the pendulum. (a) True (b) False
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
24. 24.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
25. 25.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
28. 28.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a mirror (d) a magnet
29. 29.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
30. 30.True or false: a balloon is needed for the pendulum. (a) True (b) False
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
32. 32.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a mirror
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
35. 35.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
37. 37.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) yeast (d) a ruler
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
39. 39.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a balloon (d) yeast
40. 40.True or false: a mirror is not needed for the pendulum. (a) True (b) False

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